Producer extraordinaire Ryan Olson's Marijuana Deathsquads is a crew of pals with mics and laptops and drums and no restraint whatsoever. Over the weekend, they celebrated the release of a new mixtape, Tamper. Disable. Destroy., and the handiwork is now available to the listening public. Tracks featuring contributions from Bon Iver's Justin Vernon, P.O.S., and Polica all figure in, and the thing is devastating.Here's "Top Down," featuring Polica singer Channy Leaneagh and some unbridled rhymes Astronautalis: